cnn and, paramount, california. the many people are starting off their bapart from the bargains but some of them are going to be even without even leaving their homes. the convenience and low cost of internet shopping more attractive than ever. posing problems for traditional brick and mortar. >> online vs brick and mortar, the battle for your holiday dollars has never been so intense. for years, internet merchants like amazon had key advantages california with no sales tax. however, brick and mortar, with the rising popularity of chains and ebooks michael tucker owns this line of book stores in san francisco. >> you can save 10%. >> however, that tax advantage it. at command amazon. also, taxing of this year in other states like pennsylvania, texas. online retailers collect where they have the physical presence half. here, and california, and the sun is building to giant warehouses. amazon that-it is 1 million square feet in your los angeles but the old fashioned retailers it is another reason to worry. >> because